单电感多输出DC-DC恒流变换器关键性能及控制技术研究

Due to the serious problem of energy and environment, LED has been developed rapidly as its advantages of long service time and environment-friendly. Single-inductor multi-output (SIMO) DC-DC constant current converter meets the requirement of high-efficiency and small size. Therefore, it is an important research trend of LED drive. However, the cross regulation and complex nonlinear dynamic behaviors have shortened its application in LED drive. This project aims to develop the suitable small-signal model and discrete iterative map model for cross regulation and stability analysis, respectively. Furthermore, the control techniques for reducing cross regulation, improving transient response and extending stability region are researched. The simulation and experiment study also will be carried out. This project gives the reason of cross regulation and nonlinear dynamic behaviors of SIMO DC-DC constant current converter. It is significant for extending the application and exerting the advantages in LED drive.

随着能源及环境问题的日益突出，高亮LED因其节能环保的优点，得到了快速发展。单电感多输出DC-DC恒流变换器满足LED供电的高效率、小体积要求，然而，其交叉影响和复杂的非线性动力学行为严重制约了其在LED驱动领域的应用。本项目以单电感多输出DC-DC恒流变换器为研究对象，旨在通过建立小信号模型和离散迭代映射模型，明确其交叉影响产生机理和影响交叉影响的关键因素；分析影响其瞬态性能的关键控制参数，探究其复杂的分岔行为分析方法，给出其稳定边界。在此基础上，进一步研究能够有效抑制单电感多输出DC-DC恒流变换器输出支路间交叉影响、提高瞬态性能和拓展稳定运行范围的控制技术，并完成仿真和实验验证。项目在阐明交叉影响产生机理及非线性动力学行为特性的基础上，提出能够显著提升其关键性能的控制技术，对拓展单电感多输出DC-DC恒流变换器的应用范围和发挥其在LED驱动中的优势具有重要意义。

随着能源及环境问题的日益突出，高亮LED因其节能环保的优点，得到了快速发展。单电感多输出DC-DC恒流变换器满足LED供电的高效率、小体积要求，然而，其交叉影响和复杂的非线性动力学行为严重制约了其在LED驱动领域的应用。本项目以单电感多输出DC-DC恒流变换器为研究对象，旨在通过建立小信号模型和离散迭代映射模型，明确其交叉影响产生机理和影响交叉影响的关键因素；分析影响变换器瞬态性能的关键控制参数，探究其复杂的动力学行为分析方法，给出电路参数的稳定边界。在此基础上，进一步研究能够有效抑制单电感多输出DC-DC恒流变换器输出支路间交叉影响、提高瞬态性能和拓展稳定运行范围的控制技术，并完成仿真和实验验证。通过本项目的研究，建立了单电感多输出DC-DC恒流变换器的小信号模型和离散迭代模型，阐明了输出支路间交叉影响的产生机理，提出了减小交叉影响的控制方法；揭示了系统的动力学行为，给出了电路参数和控制参数的稳定边界。研究成果对拓展单电感多输出DC-DC恒流变换器的应用范围和发挥其在LED驱动中的优势具有重要意义。